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Results 1291 to 1320 of 1506:

Vývoj nástroje pro vyhledávání geodat

David Procházka

Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(6), 389-398 | DOI: 10.11118/actaun201058060389

Effective management and sharing of geodata is one of the priorities of the European Union (INSPIRE activity) and companies all around the world. Many different companies and organisations publish their geodata using web mapping services. This situation leads to a multiple publishing of similar or completely same geodata. On the other hand, there is frequently a problem how to determine an appropriate mapserver with the required data. This paper presents a geodata search engine which solves the problem how to access geodata more effectively. Presented solution aggregates data from the different mapservers and provides an interface according to the Open Geospatial Consortium Web Map Server specification. This allows to use our solution in the standard GIS tools as common mapserver. Completely new feature is a request which allows to select map layers which fulfills specified criteria. Selection could be given by keywords in a map layer description and by defining a bounding box on Earth surface. Response is a list of appropriate layers sorted according to their relevance. Presented solution could be among other applications significant source of information for many data mining techniques. It allows to interconnect processed data with their space-temporal context.

Vnímanie kvality chleba spotrebiteľom

Ľudmila Nagyová, Patrik Rovný, Jana Stávková, Martina Uličná, Ľudmila Maďarová

Acta Univ. Agric. Silvic. Mendelianae Brun. 2009, 57(3), 115-122 | DOI: 10.11118/actaun200957030115

The aim of this paper is to evaluate consumers' perception of bread quality in Slovakia. Bread belongs to essential foodstuffs and we all have it served on our table every day.
Cereal products keep their importance in people's nutrition mainly because of their preventive effects on health. They saturate about 40 % of the daily energy need of an average European, who in average acquires from cereals about 30 % of proteins, vitamin B1, niatin and phosphorus, around 1/6 of fats (out of it 19 % of linol acid), almost 60 % of saccharides, 1/4 iron and about 13 % of vitamin B2 and calcium. If we add some cereal fiber which is an effective prevention factor of cardiovascular diseases, metabolic and oncological diseases of colon and anus, we will get a complex picture about positive effects of cereals in our nutrition. If we were to mark any foodstuff which has been accompanying the mankind in the course of history, it could be bread. Its consummation is spread in the whole world. Only the ones who once suffered from its lack have recognized its value.
It results from our research that consumers in Slovakia prefer consuming the wheat-ray bread (38.5 %). The respondents - consumers prefer at choosing buying bread in terms of the external, subjective factors, the overall shape when choosing bread (45 %) and dark color of crust (25 %). They showed minimum interest in white color crust and packaging size. In terms of the internal, objective factors, the most important factor for respondents, for women as well as for men was freshness of foodstuffs followed by fiber (with a big difference) (12.82 %).
Almost 60 % of bread consumers claimed that they did not have any possibility to obtain the required information regarding bread in supermarkets and hypermarkets because it is not possible to find professional staff providing them with the required information. A different situation is in the classical, small, self-service, and specialized stores, where personal contact of a shop-assistant and a customer is more often. Results of the performed marketing research of consumer behavior in the market with bakery products will become a sort of the initial basis for departments involved in the research. The team of co-authors have the task to define bread quality on the basis of chemical analyses in accordance with consumers needs.

TEPELNÁ A MECHANICKÁ ODOLNOST ZINKOVÉHO POVLAKU

Karel Horák, Michal Černý, Josef Filípek, Martin Fajman

Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(4), 49-56 | DOI: 10.11118/actaun201058040049

The article is aimed at studying the effect of temperature on structure of intermetallic phases of the protective zinc layer. The main objective of the article is a description of the structure and the changes that can occur during the heating process. The first part of the article deals with the description of the structure and mechanical properties of the interfacial phases and their arrangement. The main part of the article is aimed at study of brittle intermetallic phases, which arise due to increased temperature. For this reason, a set of samples of steel CSN 11 321 (DC01) was prepared. These samples were subjected to thermal heating in the tempering furnace. Subsequently metallographic cross sections were prepared, observed and assessed using SEM microscopy and EDS analysis. Also accelerated corrosion tests and pull off bend tests were performed. Conclusion of the article is trying to explain the influence of intermetallic phases on degradation of the protective layer.

Vliv druhu a ošetření na kvalitu a zdravotní bezpečnost travních siláží

Jiří Skládanka, Petr Doležal, Jan Nedělník, Hana Moravcová, Roman Poštulka, Ivo Vyskočil

Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(5), 329-336 | DOI: 10.11118/actaun201058050329

The paper evaluates the quality of model silages made of wilted grass biomass and treated with silage additives. Grass species used for the production of silages were Lolium perenne, Festulolium pabulare and Festulolium braunii harvested in the first cut at the stage of earing. The assessed grass species were wilted after the cut for an identical time 36 hours (2008), resp. 24 hours (2009). The treatment was made either with a chemical preparation (formic acid, propionic acid, ammonium formate) and/or with a biological inoculant (Enterococcus faecium, Lactobacillus plantarum, Pediococcus acidilactici, Lactobacillus salivarius, cellulase, hemicellulase and amylase). The amount of the chemical ingredient was 4 l.t-1 and the amount of the biological additive was 10 g.t-1. The biomass was after wilting ensilaged in containers whose diameter and height were 0.15 m and 0.64 m, respectively. After 60 days of ensilaging, the silages were assessed for pH, organic acids content, ethanol content and acidity of water extract (AWE); organic nutrients assessed in the silages were crude fibre (CF), neutral detergent fibre (NDF), acid detergent fibre (ADF), crude protein (CP) and digestibility of organic matter (DOM). Hygienic safety was assessed from the contents of zearalenon, fumonisin and aflatoxin mycotoxins. The high (P < 0.05) dry matter (DM) content in Festulolium pabulare silages indicates that the species tends to rapid wilting. The higher DM content reflected in lower biomass losses (P < 0.05). The lowest pH values (P < 0.05) were detected in silages made of Festulolium braunii. The fact relates to the higher content of lactic acid in the prepared microsilages. The use of ensiling additives affected the quality of extracts. Namely the application of the biological additive led to the increased content (P < 0.05) of not only lactic acid but acetic acid too. Titrable acidity was not affected by the ensiling additives. As to the emanation of ethanol, heterofermentative bacteria of lactic fermentation apparently took part in the fermentation process of the silages as well. While the evaluated forage species showed differences in the digestibility of organic matter (P < 0.05), the application of preservatives did not influence the content of organic nutrients. Fumonisin was not detected at all and aflatoxins were below the level of detection. None of the assessed factors had an effect on the content of zearalenon; in spite of the fact, an apparent tendency towards a higher content of zearalenon was recorded in Lolium perenne.

VLIV PARAZITOCENÓZ NA ZDRAVOTNÍ STAV POPULACE JELENA SIKY (Cervus nippon) V ZÁPADNÍCH ČECHÁCH

Marie Borkovcová, Jan Dvořák, Tomáš Martin

Acta Univ. Agric. Silvic. Mendelianae Brun. 2009, 57(5), 33-40 | DOI: 10.11118/actaun200957050033

The aim of this study was detection of prevalence of the parasitecoenoses of sika deer (Cervus nippon) living in the wild in the area of Western Bohemia (Czech Republic) and to compare roundup data with results from previous investigations.
All together 560 samples of excrements and 8 grallochs were examined. The research was done from March 2005 to June 2007. The samples of excrements were collected during the whole research period in periodical monthly intervals always in the amount of 20 pieces. Grallochs were examined by partial helmintological dissection, the samples of excrements by Baermann method and flotation. Parasites were detected only in 26.8 % of examined samples. The spectrum of detected parasites included: coccidia Eimeria spp. (8.6 %), lungworms (LW) Dictyocaulus sp. and Bicaulus sagittatus (23.4 %), and nematode worms from the group of gastrointestinal nematodes (GIN) (7.9 %). In fine we can confirm that the Sika game is quite resistant against parasitoses under our conditions, and health of Sika game in monitored localities is good.

Rovnovážná vlhkost dřeva při různých teplotně vlhkostních podmínkách v obvodovém plášti dřevostaveb ve vztahu k jejich spolehlivosti a životnosti

Zdeňka Havířová, Pavel Kubů

Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(2), 119-132 | DOI: 10.11118/actaun201058020119

One of the natural properties of wood and wood-based materials is their soaking capacity (hygroscopicity). The moisture content of wood and building constructions of wood and wood based materials significantly influences the service life and reliability of these constructions and buildings. The equilibrium weight moisture content of built-in wood corresponding to temperature/moisture conditions inside the cladding has therefore a decisive influence on the basic requirements placed on building constructions. The wood in wooden frame cladding changes its moisture content depending on temperature and moisture conditions of the environment it is built into. The water vapor condensation doesn't necessarily have to occur right in the wooden framework of the cladding for the equilibrium moisture content to rise over the level permissible for the reliable function of a given construction. In spite of the fact that the common heat-technical assessment cannot be considered fully capable of detecting the effects of these factors on the functional reliability of wood-based constructions and buildings, an extension has been proposed of the present method of design an assessment of building constructions according to the ČSN 73 0540 standard regarding the interpretation of equilibrium moisture content in relation to the temperature/moisture conditions and their time behavior inside a construction.

Efekt půdní aplikace zeolitu, agrisorbu a lignitu na chemické složení jetelotravních směsí v aridních podmínkách jižní Moravy

Tomáš Lošák, Jaroslav Hlušek, Jiří Jandák, Radek Filipčík, Marie Straková, Ľubica Janků, Helena Hutyrová, Daniela Knotová, Martin Lošák, Magdalena Ševčíková

Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(5), 247-254 | DOI: 10.11118/actaun201058050247

The two-year field trial was established in May 2008 on light soil in the cadastre of Ratíškovice near Hodonín in an arid maize-growing production area. Prior to sowing selected soil conditioners were applied in experimental plots of an area of 864 m2 as follows: zeolite (a mineral of high sorption capacity), lignite (the youngest coal containing humus substances) and the supplementary soil substance agrisorb (polymer organic compound capable of holding in its structure and subsequently releasing water) and they were incorporated into a profile of 0.15 m. Including the untreated control the experiment involved 4 treatments. The rates of the conditioners were as follows: zeolite - 3 l.m-2, fraction used 1-2 mm; agrisorb - 20 g.m-2; lignite - 1000 g.m-2. Three types of clover-grass mixtures were sown: landscape mixture with an addition of leguminous plants (seeding rate 200 kg.ha-1), regional mixture (100 kg.ha-1) and annual mixture (70 kg.ha-1). The aboveground biomass taken from an area of 0.05 m2 was sampled in the stage of bud setting with three repetitions to each treatment.
In 2008 and 2009 the respective treatments did not significantly change the contents of N, P, K, Ca and Mg in the aboveground biomass of the clover-grass mixtures. The differences in the contents of the macro elements were significant only between the individual types of mixtures and were due to their different botanical composition. Between the years 2008 and 2009 no significant differences were discovered among treatments in terms of the contents of P and K in none of the mixtures, but the Mg content decreased in the second year in most treatments by 50 relative % and more. The contents of N and Ca increased significantly in the second year in the regional and landscape mixtures; in the annual mixture also the Ca content. The year-on-year differences however were seen also in the untreated control showing the apparent effect of the year. A longer period of monitoring is necessary if we are to achieve an objective evaluation of the effect of the applied preparations on the chemical composition of the aboveground biomass.

PRODEJNÍ ÚSPĚŠNOST BALENÉHO ČERSTVÉHO OVOCE A ZELENINY

Radmila Presová, Oldřich Tvrdoň, Lucie Hrdá

Acta Univ. Agric. Silvic. Mendelianae Brun. 2009, 57(6), 215-224 | DOI: 10.11118/actaun200957060215

The paper deals with the marketability of packaged fruit and vegetables, as a new trend of satisfying consumer needs, in connection with selling-culture of stall selling and self-stores sales. It emphasize fact that food have to be wrapped into the quality, health packages, under the conditions of the Act. 477/2001 Coll.
Specific data for the analytical part of this paper was provided by Hortim International Ltd. This company has operate on the Czech market since 1995. Analysis of the economic results confirmes the legitimacy of the sale of packaged fresh fruits and vegetables, but there will be neccesary longer lasting promotion. This fact also confirmed the research of consumer demand, that was made by authors. Determinant for the success sales are these factors: consumer confidence that the packaged products of fruit and vegetables are high quality.

VLIV PŘÍDAVKU ESENCIÁLNÍ OLEJŮ BYLIN S OBSAHEM ANETHOLU NA STRAVITELNOST ŽIVIN U PRASAT

Ladislav Zeman, Petr Mareš, Michal Večerek

Acta Univ. Agric. Silvic. Mendelianae Brun. 2009, 57(1), 171-180 | DOI: 10.11118/actaun200957010171

The plant additives and their functional components can selectively influence the intestinal microorganism growth in positive or negative direction. If the growth promotion relates with positive microorganisms and growth elimination is connected with pathogens the results is nutrients utilization improvement, stimulation of immunologic system or positive influence of intermedial metabolism. Anethole is one of these important plant metabolites. There are described following positive effects of anethole in human medicine: vasorelaxant, antithrombotic, releasing of heart function, fytoestrogenic (it mean improving of milk secretion, menstruation, promotion of menses, birth improvement, men's hormonal changes improving, sexual libido improving), antioxidative, antifungal, improvement of derma permeability, antihelmintic, insecticidal, yeast elimination, antibacterial, antipyretic.
In our work the effect of anise and fennel essential oils on nutrients utilization in pig experiment was evaluated. The trial was organized in accredited experimental stable Žabčice of Mendel University of Agriculture and Forestry Brno. The high level efficiency of experimental animals is mentioned through general parameters (average daily gain, feed intake and feed conversion). The results of nutrients utilization rate show slightly higher digestibility of nutrients in treatment with anise oil, this improvement is not higher then 1.0 %. We can see also improvement of nitrogen retention in body mass on level of 5.6 % (anise treatment compared with control group). There is low variability between experimental animals (except nitrogen retention coefficient) but we can not see any statistical significance. On base of these results we can say the used phytogenic additives do not affect negatively the nutrient utilization in used concentration (0.1 % of essential oil in feed mixture) and are fully eligible for animal nutrition. These results are also supported by few research papers connected with similar topic.

Reologický profil surové syrovátky

Libor Severa, Jaroslav Buchar, Šárka Nedomová, Květoslava Šustová

Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(1), 167-174 | DOI: 10.11118/actaun201058010167

The results of raw whey rheological behavior investigation - particularly viscosity, dependence on temperature, time, and share rate, are presented. The whey samples have been examined under temperature ranging from 17 to 90 °C and under share rate ranging from 0.34 to 68 s-1. The measurements have been performed using rotary digital viscometer (concentric cylinders geometry). The material was found to be temperature dependent (non-linearly), time dependent and shear thinning. Received data have been successfully characterized by several mathematical models (power, exponential, and polynomial) in MATLAB® software with satisfying correlations between experimental and computed results. Following correlations have been achieved: temperature dependence with r2 = 0.993 using polynomial model, time dependence with r2 = 0.985 using power model, and shear thinning behavior r2 = 0.998 using power model. The results are quite useful for practical design of technological equipment such as pumps and piping.

Biologie Anacampsis populella (Clerck) (Lepidoptera, Gelechiidae)

Jaroslav Urban

Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(4), 223-232 | DOI: 10.11118/actaun201058040223

The paper deals with the occurrence, development and harmfulness of Anacampsis populella (Clerck) (Gelechiidae) on Populus tremula L. The pest was monitored on 5 to 15-year old trees of the species at Forest District Bílovice nad Svitavou (near the city of Brno) in 2008 and 2009. Caterpillars made leaf rolls of a mean length of 37.3 mm and width 5.5 mm there. In 80% leafrolls, one leaf was rolled up and in 20% two to five leaves. Towards the abaxial face of leaves, all leaves with caterpillars were rolled up but only part of peripheral leaves. Caterpillars occurred from 20 April to 25 June. They developed only through three instars and damaged leaves on an area of about 12.2 cm2. Grown up caterpillars pupated mostly in leafrolls. Pupae occurred from 10 May to 25 July and imagoes from 20 May to the beginning of August. Some 63 to 88% population of caterpillars and pupae were killed by natural enemies (particularly insect parasitoids, insect predators and birds). Eggs overwinter. The pest development is univoltine.

Analýza konkurenceschopnosti českého agrárního zahraničního obchodu v rámci světového agrárního trhu a v rámci agrárního trhu zemí EU27

Miroslav Svatoš, Luboš Smutka

Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(6), 503-514 | DOI: 10.11118/actaun201058060503

This paper analyses the commodity structure of Czech (CR) agrarian trade in relation to the EU countries. An emphasis is put on comparative advantages of particular aggregations from the view-point of their application on the EU internal market. This analysis is based on an evaluation of comparative advantages by means of a modified Balassa index. It is studied in two stages, for the internal EU market and the world market. The analysis results are then shown in a graph. Subsequently, the authors implement an idea arising from a BCG matrix on the results of the graphic presentation. The aim is to identify those aggregations (SITC, rev. 3) which are or have a potential to be a pillar of agri-business (ie, the "cash cows" and "stars"), and vice versa to show the aggregation which are non-prospective in the long term or problematic (ie, the "dogs" and "problem children"). As start are identified as those aggregations which are characterised by the highest growth rate of comparative advantage value. From the analysis results, changes are apparent if we compare the CR trade commodity structure in relation to the EU countries. Findings also concern the development of comparative advantages and following CR specialisation on trade with certain aggregations.

Diverzita střevlíkovitých (Carabidae) na různých sukcesních stadiích vápencového lomu Hády (Brno, Česká republika)

Vladimír Hula, Pavla Šťastná

Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(4), 57-64 | DOI: 10.11118/actaun201058040057

Carabid beetle samples were obtained from pitfall traps at an abandoned quarry of a limestone massif Hády near Brno. The samples were collected each month between April and September in years 2007-2008. A total of 61 species were registered and represented by 2619 individuals. Similarity of individual areas was evaluated by using the Cluster analysis - the most significant similarity was found in reclaimed sites (99.87%) and control sites (90.52%). The difference in similarity between two observed years came out distinctively (F = 2.906; P = 0.0010). Three species (Cylindera germanica, Licinus cassideus and Aptinus bombarda) from the Red List of Invertebrate Animals of the Czech Republic and one species (Cylindera germanica) affected by the Order 395/1992 Sb. as amended by Decree 175/2006 Sb. were detected among the observed species. The reclaimed land and surrounding field areas left to natural succession were dominated by species of open habitats.

Nová uplatnění jetelovinotravních směsek ve struktuře pícnin na orné půdě

Jiří Sláma, Alois Kodeš

Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(5), 337-344 | DOI: 10.11118/actaun201058050337

The use of clover-grasses in the structure of fodder crops grown on arable soil, especially those with intergeneric hybrids as the main component part, could avert the negative current trend, i.e. further decreasing the area of perennial fodder plants or fodder crops as a whole on arable soil. They have an irreplaceable role in crop sequences and in preserving the cultural character of the countryside, above all due to the fact that they improve soil fertility and microbial life in the soil and that they have an excellent pre-produce value, and, at the same time, they are applied in various farming systems (both conventional and ecological) and in various climatic conditions, and agricultural businesses are well equipped for growing, harvesting and storing them. In the Czech Republic, the area of fodder crops grown on arable soil was decreased from 1,019.9 thousand hectares to mere 396.7 thousand hectares between 1980 and 2009, which is 15.6 % of the total area of arable soil whereas perennial fodder plants only take up 8.5 %. Fodder from clover crops and clover-grass growths on arable soil are one of the main resources of voluminous fodder for dairy cows. Most of this fodder is preserved through a fermentation process (silages, hay storage); a smaller part is fed as fresh fodder, or serves for production of hay. Silages made with perennial fodder plants are the most important source of both proteins and other nutrients for ruminants, especially for high-yielding milch cows. The basis of fodder production systems are the conservative elements of the landscape area (geomorphology) in combination with the progressive elements (weather conditions, plants and human labour) and relict ones, the representative of which is the soil. The fodder production systems in Europe are divided into five main fodder production zones. From this point of view, the areas where short-term clover-grass mixtures are grown on arable soil could be classed with Zone 4, i.e. intensive fodder production and cattle breeding. This characterisation corresponds with the Vysočina Region (the Czech Republic), which is the focus of our work even though extensive breeding can be found in this area on a smaller scale as well. Therefore, our aim was to verify the production and qualitative parameters of the fodder crops and mixtures included in the test in chosen agricultural businesses in the Vysočina Region and to recommend the most suitable variant for the given area. A statistically significant correlative relationship (P < 0.05) was proved between the net energy for lactation contents and the percentage of organic matter digestibility. The evaluation of the production parameters evidently shows the favourable influence of the grass component part or of intergeneric hybrids on the stability of dry matter yield per hectare as well as on the stability of individual nutrients.

Reakce polních okurek (Cucumis sativus L.) na opoždění agrotechnických termínů a fenologických fází v Polsku

Robert Kalbarczyk

Acta Univ. Agric. Silvic. Mendelianae Brun. 2009, 57(5), 159-166 | DOI: 10.11118/actaun200957050159

The aim of the work was to determine a potential decrease in yields and a risk of cultivation of field cucumber of pickling varieties in Poland caused by the delay of the dates: flowering, fruit setting and harvesting. In order to carry out this task the following phenological dates from whole Poland were used: emergence, flowering and fruit setting and also the agrotechnical dates: sowing and harvesting from 28 experimental stations of the Research Centre for Cultivar Testing (COBORU) through 1966-2005. On the basis of linear regression analysis the relation between the yield of field cucumber and the analysed agrotechnical and phenological dates was determined, taking into account the trend of the yield from 1966-2005. Moreover, a potential decrease in the yield caused by the delay of phenophases was calculated for both the whole country and for its particular regions. The measure of matching of the regression function to empirical data was the determination coefficient and the regression equation error. Moreover, to determine the share of each of the selected factors in the prediction of cucumber yield partial correlation analysis was used. The obtained results may be used, among other things, in the meteorological protection of agriculture and improvement of new technologies of cucumber field cultivation.

Výskyt, vývoj a hálkový polymorfismus Harmandiola cavernosa (Rübs.) (Diptera, Cecidomyiidae)

Jaroslav Urban

Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(2), 235-258 | DOI: 10.11118/actaun201058020235

A gall midge Harmandiola cavernosa (Rübs.) is the second most frequent Cecidomyiidae species on Populus tremula in the CR. In 2007 and 2008, it occurred very abundantly in Forest District Bílovice nad Svitavou, Training Forest Enterprise Masaryk Forest in Křtiny (former Brno-venkov District). Imagoes occurred there at the end of April and at the beginning of May. Galls grew up as early as at the end the first week in May. The formation of galls is mainly indicated by larvae of the first instar and partly larvae of the second instar. Larvae of the third instar did not participate in the creation of galls. Mature galls were on average 5.4 mm long, 4.8 mm wide and 4.7 mm high showing an inner chamber of an average length 2.4 mm and width 1.4 mm. Larvae abandoned galls from the end of May until mid-July. On average, 44% larvae completed successfully their development in galls. About 26% larvae were killed by insect parasitoids (mainly Torymus quercinus Boh.) and then same proportion of larvae died without any apparent exogenous causes). Insect predators and birds killed 4% larvae on average. It has been found that mortality factors markedly participated in the size, morphological, anatomical and physiognomic differentiation of galls. Gall polymorphism was analysed in detail in the paper. Galls significantly unfavourably affected the size of leaves and thus also photosynthesis.

Zatížení ekosystému středního toku řeky Jihlavy těžkými kovy

Josef Makovský, Petr Spurný, Jan Mareš, Josef Hedbávný, Tomáš Vítek

Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(5), 255-262 | DOI: 10.11118/actaun201058050255

The monitoring of the contents of heavy metal pollutants: total Hg, Pb, Cd, Cr, Ni, Cu and Zn in fish muscle, water, bottom sediments and zoobenthos was realised in May and July of 2007 on two localities: Vladislav, upstream the Dalešice and Mohelno dam reservoirs (Czech Republic), and Hrubšice downstream them. Samples of fish muscle were taken from chub (Leuciscus cephalus), barbel (Barbus barbus) and brown trout (Salmo trutta m. fario). Water, bottom sediments and zoobenthos samples were taken as representative ones from both localities. The samples were analysed with the apparatus AMA 254, AA-300 and SPECTR AA-30. In water of both sites there was found above-limit (0.1 µg/l) content of mercury (0.99 µg/l Hrubšice, 2 µg/l Vladislav). The bottom sediments in Vladislav were most contaminated by Pb (120.21 mg/kg) and Cr (164.90 mg/kg) and in Hrubšice locality by Ni (90.66 mg/kg). High concentration of Pb (25.84 mg/kg) in Vladislav and of Ni (240.90 mg/kg) and Cr (140.5 mg/kg) in Hrubšice was found in zoobenthos. In the point of view contents of heavy metals in fish muscle tissue, statistically significant (p < 0.05) higher content of Hg was found in barbel and chub from Vladislav (0.155 ± 0.012 mg/kg and 0.163 ± 0.064 mg/kg) in comparison with Hrubšice (0.073 ± 0.035 mg/kg and 0.095 ± 0.082 mg/kg) as similarly as the concentration of Cd in chub (0.062 ± 0.140 mg/kg at Vladislav and 0.006 ± 0.002 mg/kg at Hrubšice), whereas the content of Ni in barbel was statistically significantly higher at Hrubšice (0.175 ± 0.042 mg/kg) compared to Vladislav (0.050 ± 0.017 mg/kg). The last significant difference was found in Pb concentrations, when fish from Hrubšice were more contaminated (concentrations 0.155 ± 0.048 mg/kg in barbel and 0.182 ± 0.110 mg/kg in chub) than the same species from Vladislav (contents 0.050 ± 0.017 mg/kg and 0.064 ± 0.005 mg/kg). In theme of consumption risk of the muscle tissue of fish by FAO/WHO, the Hg was limiting factor at both sites. In the locality Vladislav provisional tolerated weekly intake (PTWI) was 1.94 kg in barbel and 1.84 kg in chub. In the Hrubšice it reached 4.12 kg in barbel, 3.15 kg in chub and 5.51 kg in brown trout.

Chování spotřebitele na trhu s médii

Martin Přibyl, Ladislav Stejskal, Ondřej Dufek, Klára Ondrášková

Acta Univ. Agric. Silvic. Mendelianae Brun. 2009, 57(6), 225-234 | DOI: 10.11118/actaun200957060225

The paper deals with a correlation between factors identifying a household representative and frequency of media usage. Particularly it concentrates on the analysis of internet and daily press usage. Internet is a constantly developing communication channel which is increasingly used in the field of marketing communication and contributes to the development of business environment. Due to its characteristics it is an ideal mean for multilingual communication and communication on international markets. The daily press is on the other hand a representative of traditional media. It is perceived by public as a more natural communication channel. The paper seeks an answer to the question which communication channel is more suitable to communicate with a particular target group - press or the internet. The paper tests the correlation between identification factors and frequency of internet and press presence. Testing will be carried out by using a database obtained in a primary research conducted by the Department of Marketing and Trade at the Faculty of Business and Economics, Mendel University in Brno. Results published in the paper are part of research objective, id. code: 62156 48904 "The Czech Republic in the process of integration and globalization and the evolution of agrarian and service sectors in the new conditions of the European integrated market", thematic area 03 "The evolution of trade relationships regarding changes in a life style and purchasing behaviour and changes of business environment in the process of integration and globalization" that is conducted with a financial support of Ministry of Education, Youth and Sports.

Vliv vybraných faktorů pěstování na výnos a obsah dusíkatých látek v zrnu sladovnického ječmene

Petr Babiánek, Petra Vavroušová, Pavel Ryant, Luděk Hřivna, Radim Cerkal

Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(2), 19-26 | DOI: 10.11118/actaun201058020019

The objective of the three-year small-plot trial was to assess the effect of the weather of the year, forecrop, variety, form of sulphur (elementary and sulphate) and additional nitrogen fertilising on the yields and the content of N-substances of the malt barley varieties Jersey and Sebastian. The trial was carried out in 2006-2008 at the experimental site of the Mendel University of Agriculture and Forestry in Brno, the Žabčice locality. The Jersey and Sebastian varieties were grown after three different forecrops - winter wheat with ploughed down straw, sugar beet with ploughed down tops and maize for grain with ploughed down straw. The fertilising treatments differed in the form of sulphur (elementary and sulphate) and date of the additional nitrogen fertilising. As the sulphate form we chose ammonium sulphate (40 kg.ha-1 N and 45.6 kg.ha-1 S) and the same amount was supplied in the form of elementary sulphur; nitrogen was in the form of urea. A dose of 30 kg.ha-1 of ammonium nitrate with limestone (ANL) was applied as additional nitrogen fertilising. The results show that the weather conditions of the respective years had an almost 94 % effect on yields. The very strong effect of the weather overshadowed the effect of the forecrop (3.8 %); the effect of the variety was only half that of the forecrop (1.8 %). The form of additionally applied sulphur and nitrogen during cultivation had a relatively little effect on the yields (0.2 %). The forecrop affected the content of N-substances most of all (47.3 %). The quality of barley grain is markedly dependent on the course of the weather of the year (40.1 %); the effect of the variety on the content of N-substances was relatively low (1.6 %). Applications of various forms of sulphur had a small effect on the grain quality (0.01 %), while the effect on additional nitrogen fertilising on the content of N-substances was 8.5 %.

Fytoextrakce těžkých kovů z odpadních kalů rostlinami

Jaroslava Bartlová, Barbora Badalíková, Jan Hrubý, Vasil Gjurov

Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(5), 27-34 | DOI: 10.11118/actaun201058050027

In 2008 and 2009, studies made contents of cadmium and lead in the soil and their uptake by non-traditional plants were studied in a small-plot trial. At the same time also the effect of bio-algeen preparations on phytoextraction of heavy metals by these plants was investigated. Experimental plots were established on the reclaimed land after closing down mining operations in the town of Žacléř (North-East Bohemia) where a layer of sewage sludge from a wastewater treatment plant 0.6-0.8 m thick was subsequently applied. The locality is situated in the altitude of 612 m, its average annual temperature is about 6.8 °C and the mean annual precipitations are 857 mm.
Analyses revealed higher concentrations of heavy metals in the applied sewage sludge. The average concentrations of lead and cadmium were 180 mg.kg-1 and 6.89 mg.kg-1, respectively. The experiment had two variants: Variant 1 - sewage sludge without any other substances, and Variant 2 - sewage sludge + bio-algeen preparations (B. A. S-90 or B. A. Root Concentrate). To find the most suitable plant species for the phytoextraction of cadmium and lead, the following non-traditional plants were cultivated in both variants: fodder mallow (Malva verticillata L.), rye (Secale cereale L. var. multicaule METZG. ex ALEF.) and white sweet clover (Melilotus alba MEDIC.). The highest accumulation of cadmium and lead in the aboveground biomass was found out in rye, viz 14.89 mg.kg-1 DM and 14.89 mg.kg-1 DM of Cd and Pb, respectively., As compared with other plants under study, white sweet clover exhibited the significantly lowest capability to extract both heavy metals from soil (viz 0.22 and 3.20 mg.kg-1 DM of Cd and Pb, respectively). A positive effect of bio-algeen on phytoextraction of cadmium and lead was evident in all plants. The highest yield of aboveground biomass was recorded on the plot with white sweet clover with added alginate (496 g.m-2). Of plants under study, the fodder mallow seems to be the most suitable crop for the phytoextraction of both metals (0.35 and 5.87 mg.m-2 of Cd and Pb, respectively).

PROBLÉM DUÁLNÍ STRUKTURY ZEMĚDĚLSKÝCH PODNIKŮ V EVROPSKÝCH TRANZITIVNÍCH EKONOMIKÁCH

Vojtěch Tamáš

Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(6), 571-578 | DOI: 10.11118/actaun201058060571

This paper deals with the dual farm structure, with a closer focus on the transitional economies of the EU. There are characterized and analyzed the factors which have a significant impact on both small family farms and the large agricultural enterprises. The part of the analysis is also the demonstration of these factors in transition economies, where the changes manifest themselves most strongly in present agribusiness. Assumptions of the development for agriculture in the early transition period significantly differed from the subsequent actual development of this sector in transition economies. Present a very diverse structure of agricultural holdings in individual economies involves extremes. Significantly different is the size of farms and their organizations. These differences are documented on the example of the Czech Republic, Slovakia and Hungary. An important role in terms of farm size play returns of scale and flexibility. The determinants of flexibility are demonstrated by the small Polish family farms.

Označovanie ovocia a rozdiel medzi domácim a dovezeným ovocím mierneho pásma z pohľadu slovenského spotrebiteľa: prípadová štúdia z nitrianskeho regiónu

Zuzana Šajbidorová, Jozef Lušňák

Acta Univ. Agric. Silvic. Mendelianae Brun. 2009, 57(3), 165-172 | DOI: 10.11118/actaun200957030165

Fruit consumption and production in Slovakia was very low for many years and it is still decreasing. Paradoxically, population consume less fruit today as it was in 1990 although the supply of home made and imported fresh fruit has got better.
The aim of the paper is to identify and analyse the attitude and behaviour of Slovak fruit consumer from Nitra region on the basis of questionnaire research. The main task is consumer perception of information about fruit and also difference between home made fruit from Slovakia and imported soft climate fruit from abroad. We have used an association analysis to find out dependence between individual answers and respondent identification characteristics (gender, age, education, residency).
As a result the interest in fruit place of origin depends on the age of respondent and thereby on the previous fruit purchase experience - negative or positive one, respondent opinion of fruit quality class labeling in stores in Slovakia depends on respondents residency, prefering of home made soft climate fruit by its purchase in comparison to imported fruit depends on the age (previous experience) of respondent - consumer.

Mobilní využití digitálních geografických dat v prostředí Apple iPhone

Jiří Kamínek, Martin Klimánek

Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(4), 89-96 | DOI: 10.11118/actaun201058040089

This article deals with the possible deployment of the Apple iPhone device as mobile geoinformation technology. An examination of the possibilities of the device, the development tools and the Web Mapping Service (WMS) was followed by developing a prototype of an application called WhateverMap. The application uses maps from the WMS, which are available in the field through mobile data communication. The application interface was designed around the User Experience model so that its control is easy to grasp and intuitive. It also features support to the determination of the current location. To make working with the application more comfortable it integrates a database of WMS servers. The user is thus given an overview of all the maps available and can easily add them as desired. The application can be downloaded free of charge from Apple's AppStore on the internet.

Efekt hnojení dusíkem a bórem na výnos a kvalitu řepkového semene

Ladislav Varga, Otto Ložek, Ladislav Ducsay, Peter Kováčik, Tomáš Lošák, Jaroslav Hlušek

Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(5), 391-398 | DOI: 10.11118/actaun201058050391

Field trials with winter rape (Brassica napus L. var. napus) variety Rasmus were established in August in the years 2002-2004 at the experimental station in Kolíňany which belongs to the Slovak University of Agriculture in Nitra. In the experiments we explore the effect of supplementary spring topdressing of rape with nitrogen and boron in the BBCH 29-30 stage with regard to the yields of seeds and their qualitative parameters (TSW, content of oil and crude protein). In the experiment we applied DAM-390 (solution of ammonium nitrate and urea, 30% N) at a rate of 30 kg N/ha and Humix Bór (humic acids + N, K, B) at a rate of 0.240 kg B/ha. The different climate conditions in the respective years had a significant effect on yields of rapeseed and ranged as follows: 2003: 1.80-2.29 t/ha; 2004: 2.60-3.35 t/ha; 2005: 2.45-3.29 t/ha. The significant decrease in seed yields in the first year of the experiment was caused namely by the deficit in precipitation in January, February and June 2003 and high temperatures in May and June in the same year. In terms of the individual years and the three-year average the application of Humix Bór itself did not significantly improve the yield and qualitative parameters of seeds compared to the unfertilised control. In a three-year average the application of the N fertiliser alone or in combination with Humix Bór increased seed yields and the crude protein content by 22.4-30.7 % and 4.0-4.9 rel. %, respectively, compared to the unfertilised control. The significantly highest seed yields (2.98 t/ha) were achieved when the plants were treated with a combination of nitrogen and Humix Bór as compared to all the other treatments (2.28-2.79 t/ha). The oil content in seeds increased significantly to 44.1% only when treated with a combined application of DAM-390 and Humix Bór as against the unfertilised control (42.8%). Fertilisation did not change the TSW which ranged only between 4.47 and 4.67 g.

MOŽNOSTI VYUŽITÍ HYPERELASTICKÝCH MATERIÁLOVÝCH MODELŮ V NUMERICKÉ ANALÝZE LISOVÁNÍ DŘEVOTŘÍSKOVÉHO KOBERCE

Václav Sebera, Jan Tippner

Acta Univ. Agric. Silvic. Mendelianae Brun. 2009, 57(4), 83-94 | DOI: 10.11118/actaun200957040083

The main goal of the work was to evaluate a possibility of using various hyperelastic material models implemented into ANSYS computational system for the numerical analysis of wood-strand mat pressing or wood-based composites. Subsequently, the most suitable hyperelastic model was used as a material model in compression simulation. Pressing itself was modelled as a contact transient analysis with wood-strand mat being defined as a homogenous and isotropic continuum with the chosen material model. In the analysis only displacement degrees of freedom are considered. Output of the simulation is a contact pressure, which is necessary to apply to compress the mat on the required height. The analysis serves as a take-off platform for further research in wood-based composites pressing process.

Bionomie a cecidogeneze Contarinia petioli (Kieffer) (Diptera, Cecidomyiidae)

Jaroslav Urban

Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(2), 259-280 | DOI: 10.11118/actaun201058020259

Recently, the abundant occurrence of galls of Contarinia petioli (Kieffer) was noted on Populus tremula in the Brno region and elsewhere in southern Moravia. The bionomics and cecidogenesis of the gall midge was studied on 5 to 15-year-old aspens in Forest District Bílovice nad Svitavou, Training Forest Enterprise Masaryk Forest in Křtiny in 2007 and 2008. Imagoes fly there at the end of April and at the beginning of May. Females lay eggs in several partial clutches at 1 to 6(10) pieces. About 91% newly hatched larvae settle on petioles of unfolding leaves, about 8% on the bark of terminal parts of shoots and about 1% on leaf blades. By means of sucking the larvae of the 1st and 2nd instars galls are created in the 1st half of May. Larvae of the 3rd instar occur in galls from the 20th May when galls are grown-up. Larvae abandon the galls in the 1st decade of June through an oval hole 0.6 × 0.4 mm in diameter. Galls are on average 6 mm long, 5.4 mm wide and 5.1 mm high. If they are localized within a short distance of each other then often create formations up to 17 × 11 × 9 mm in size. There are 1 to 6(10) chambers in galls and in each of them, only one larva develops. The paper deals in detail with the differentiation of galls including chambers as well as natural enemies of the gall midge. Torymus quercinus Boh., T. cultrans Graham & Gijswijt (Torymidae) and Tetrastichus sp. (Eulophidae) rank among natural enemies of larvae in galls.

Relaxace sil v sýru Eidamského typu během jeho zrání

Šárka Nedomová

Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(5), 271-280 | DOI: 10.11118/actaun201058050271

The present study was performed to determine the influence of fat content and ripening time on changes in the viscoelastic properties and, separately, in the viscous and elastic properties of Edam cheese, based namely on the results of a stress-relaxation test. In order to obtain some more detail inside on the cheese rheological behaviour a limited number of the mechanical tests under compression has been performed. The significant effect of the loading rate has been demonstrated. The main aim was to describe the experimental results in terms of the semi-empirical Maxwell model, which describe the rheological properties of cheese during ripening. Results suggest that the tested cheeses behave like linear viscoelastic body. The fat content has no influence on the elasticity as well the viscosity of the cheese during its ripening.

PŮSOBENÍ STRESU U VRCHOLOVÉHO MANAGEMENTU A JEHO DOPADY DO ZDRAVOTNÍ A PRACOVNÍ OBLASTI

Dana Maria Staňková, Miloš Drdla

Acta Univ. Agric. Silvic. Mendelianae Brun. 2009, 57(6), 235-240 | DOI: 10.11118/actaun200957060235

Within the frame of this paper the key theoretical knowledge to the selected topic is described, the presentation of partial results and discussion on the issue of the psychological aspects of managerial work, focusing on stress and its manifestations are submitted. The aim of this research was to identify the most frequent stress symptoms in the physiological, emotional and behavioral field and to define the main factors which cause them in work and private life terms. For the purpose of this research of stress effects on health area a questionnaire technology of our own design was chosen. For a deeper understanding of sources of an increased psychological stress in managerial activities a technique of interviews with the top managers was used. Research investigation has showed the action of stress on the senior managers, particularly increased during the current economic recession. The most significant signs of stress are manifested in physiological area, especially by fatigue, headache, digestion problems and sleep disturbances, as in the emotional area by anxiety, excessive concern and overall irritability. At the same time stress impacts also the behavioral area, where it has a negative impact to the work and family life. In the course of processing this subject, an absolutely obvious need occurred for a deeper processing of this large area of work stress, which will be subsequently dealing with, and whose output will be, the methodology of anti-stress strategy for HR (Human Resources) managers and Senior Executives of companies to prevent stress, promote health and quality of living conditions in the workplace.

Vliv společné aplikace Promalinu® v různých fenologických fázích pupenů a řezu v diferencovaných vzdálenostech na postranní větvení u tří odrůd třešně (Prunus avium L.) pěstovaných v centrální Chile

Eduardo von Bennewitz, Claudio Fredes, Luisa Gutierrez, Tomáš Lošák

Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(2), 45-50 | DOI: 10.11118/actaun201058020045

A study was carried out during 2005 in the Maule Region of Chile (34.56°S, 71.5°W) to evaluate the effect of the co-application of Promalin® at different bud phenological stages and notching at different distances on lateral branching of three sweet cherry cultivars. Treatments significantly increased total feather length in comparison to the untreated control only in the case of 'Bing'. Total feather growth in these cases was more than double that of control trees. On 'Lapins' treated trees, total number of lateral shoots was in most cases significantly increased. In 'Stella' trees, total feather length and total number of lateral shoots were not affected by treatments.

Vliv skladování na obsah aminokyselin v hlízách brambor

Monika Černá, Stanislav Kráčmar

Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(5), 49-56 | DOI: 10.11118/actaun201058050049

The aim of this study was to investigate the effect of storage duration on amino acids content in potato tubers. Tubers of six cultivars were stored for 16 weeks. Crude protein was determined by the Kjeldahl method. The amino acid content was identified after acid hydrolysis; sulphur amino acids were oxidized with the mixture of hydrogen peroxide, formic acid and phenol. The essential amino acids index and chemical score was calculated. The whole egg protein was used as reference protein. The effect of storage duration and cultivar on the total amino acids content was found to be significant in all potato varieties. The level of the total amino acids contents was determined within the range of 80-87%. Similar downward trend was observed in crude protein. The essential amino acids index varied considerably among the potato cultivars, ranging from 42 to 57%. Sulfur amino acids and isoleucin were the limiting amino acids in all the investigated tubers.

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